Mushroom-bullet.



F. O. HOAGLAND.

MUSHROOM BULLET.

APPLICATION FILED FEB.24, 1914.

1,107,948. Patented Aug. 18, 1914.

W A TTOH/VEY YHE NORRIS PETERS 60-, WA: IINGTON, D C.

. WNW-ED granite rarnnrforhib FRANK O. HOAGLAND, 0F BRIDGEPORT, CONNECTICUT,AQSIGNOR TQUNION METALLIC CARTRIDGE COMPANY, OF BRIDGEPORT, CGNNECT'ICUT, A CGRIPGRATION 0F CON- ivncrrco r. MUSHROOM-BULLET.

1,167 ,948, Specification of Letters ratent. Patented Aug, 18, 1914 Application filed februaiy 24, 1914. Serial No. 820,624.

To all whom it may concern Be it known that I, FRANK O. HOAGLAND, citizen of the United States, residing at Bridgeport, county of Fairfield, State of Connecticut, have invented Improvements in Mushroom-Bullets, (Case 1),) of which the following is a specification.

This invention has for its object to produce awell balanced bullet of full weight, having a two-part cover and a core entirely filling the cover, and which will mushroom, 2'. e. flatten out, upon impact. This result I accomplish by dividing the tapering portion of the bullet into a plurality of sections of progressive diameters terminating in steps or shoulders.

In the accompanying drawing forming a part of this specification, Figures 1, 2, and 3 are elevations partly broken away, illustrating variant forms in which I have carried the invention into effect, and Fig. 4 is a view showing the bullet mushroomed by impact.

10 denotes the core of my novel bullet which is made of relatively soft metal, 11 the body cover and 12 the tip cover. In order to impart to the bullet the mushrooming quality without lightening it to the slighest extent or changing its balance, I roll, swage or otherwise form in the tapering portion of both the tip cover and the core a plurality of annular grooves or de-- pressions thus forming shoulders or steps which may be more or less abrupt and are progressive in diameter.

In the form illustrated in Fig. 1, the grooves are in the form of a right angle and divide the tapering portion of the bullet into cylindrical sections 13 terminating in shoulders 14 at right angles thereto. The diameters of the sections vary progressively, each section except thetwo end ones having a shoulder at each end. The shouldersat the front ends of the sections extend inward toward the axis of the bullet, each intersecting the base of the nextsmaller section in front and the shoulders at the rear ends of the sections extend outward, each intersecting the front end of the next larger cylindrical portion in the rear thereof.

In the form illustrated in Fig. 2 the grooves are in the form of an obtuse angle. The sections, indicated by-15, taper slightly from the base toward the tip and the shoulders, indicated by 16, incline outward and forward from a diametrical line through the front end of the larger of the two sections connected by the shoulder.

In the form illustrated in Fig. 3, the sec tions, indicated by 17, are shown as tapering substantially as in Fig. 2 and the shoulders, indicated by 18, incline inward and backward from a diametrical line through the front end of the larger of the two sections connected by the shoulder. It should be understood, however, that the special configuration of the sections and shoulders is wholly immaterial so far as the principle of the invention is concerned, the gist of which lies in the division of the tapering portion of the bullet into sections of progressive diameter, terminating in shoulders. The effect produced by the formation of annular grooves in the tapering portion of the bullet, i. e. the dividing of that portion of the bullet into sections of progressive diameter terminating in shoulders, is to increase the resistance of the objective to the passage of the bullet, so that the bullet is retarded, slowed up. The formation of the grooves moreover stretches and weakens the metal of the tip cover sufficiently so that upon impact of the bullet with an objective the successive sections will telescope, the tip cover will be ruptured and the entire for ward end of the bullet will mushroom, as indicated in Fig. 4:.

In order to prevent the possibility of the tip cover becoming detached from the core, holding points 21 may be struck out from the metal of the tip cover and forced into the core, as clearly shown in the drawing.

Having thus described my invention I claim A full jacketed mushroom bullet comprising a core, a body cover and a tip cover,

the tapering portion of the core and the caused to telescope and the forwerdendof tip cover having formedtherein a plurality the bullet to mushroom.

of annular depressions which divide the In testimony whereof I afiixjmy signatapering portion of the bulletinto cylinture in presence of two Witnesses. 1 A; t 5 drioal sections of progressive diameter, each FRANK O; HOAGLAND.

terminatingin a shoulder, the tip cover be- Witnesses: U f l ing stretched and weakened so that upon WILLIAM M. THQMS,

impact the sections; of the tip cover are EDWARD H. ALLEN;

Copies of this patent may be obtained for five cents each, by addressingthe Gommissioneiof Patents, 2

i Washington, I). C. r 

